Eucaglobulin 1, a new complex of gallotannin and monoterpene, was isolated from the leaves of Eucalyptus globulus. Its structure was determined by spectral methods.
Two new diterpenoids, maoecrystal U and epi-maoecrystal P were isolated from the leaves of Isodon eriocalyx. Their structures were determined as 6 beta-acetoxy-15 beta-hydroxy-3 alpha, 20epoxy-ent-kaur-16-ene-1,7-dion...Two new diterpenoids, maoecrystal U and epi-maoecrystal P were isolated from the leaves of Isodon eriocalyx. Their structures were determined as 6 beta-acetoxy-15 beta-hydroxy-3 alpha, 20epoxy-ent-kaur-16-ene-1,7-dione 1 and 16 (s)-methoxymethyl-6 beta,7 beta-dihydroxy-7 alpha,20-epoxy-ent-kaur-2,3-ethenylene-1, 15-dione 2 respectively, by spectroscopic methods.展开更多
Erigoster A (la), a new compound with a novel basic skeleton, was isolated from Erigeron breviscapus. The structure elucidation and complete proton and carbon NMR assignments were achieved by the utilization of a comb...Erigoster A (la), a new compound with a novel basic skeleton, was isolated from Erigeron breviscapus. The structure elucidation and complete proton and carbon NMR assignments were achieved by the utilization of a combination of two-dimensional NMR techniques.展开更多
Phytochemical re-investigation of the anti-leukemia plant Laggera pterodonta afford four new eudemsanes (1-4) and six new eudesmanoic glucosides (5-10), Their structures were elucidated by high field 1D and 2D NMR tec...Phytochemical re-investigation of the anti-leukemia plant Laggera pterodonta afford four new eudemsanes (1-4) and six new eudesmanoic glucosides (5-10), Their structures were elucidated by high field 1D and 2D NMR techniques and chemical methods.展开更多
Four new diterpenoids named maoecrystal Q-T (1-4) were isolated from the dried leaves of Isodon eriocalyx. Their sturctures were established by spectroscopic methods.
Ceratoside A (1), a new compound was isolated from the butanol-soluble fraction of Ceratostigma willmottianum, Its structure was determined by the utilization of 2D-NMR techniques.
Two new diterpenoid glucosides, cleroserroside A and cleroserroside B, were isolatedfrom the aerial pans of Clerodendrum serratum var. amplexghlium Moldenke. Their structureswere characterized by spectral and chemical...Two new diterpenoid glucosides, cleroserroside A and cleroserroside B, were isolatedfrom the aerial pans of Clerodendrum serratum var. amplexghlium Moldenke. Their structureswere characterized by spectral and chemical methods.展开更多
Five new flavonoids were isolated from the aerial parts of Bidens pilosa L. var. vadiata Sch.-Bip.. Their structures were established on the basis of spectroscopic methods.
From the aerial parts of Clerodendrum indicum, bye new compounds, cleroindicins B-F (1-5) were isolated and their structures identified by spectral method.
From the dried leaves of I. eriocalyx, three new 6,7-seco- ent-kaurane diterpenoids epi-eriocalyxin A (2), maoecrystal N (3) and maoecrystal O (4) were isolated. Meanwhile, the structure of a known constituent eriocal...From the dried leaves of I. eriocalyx, three new 6,7-seco- ent-kaurane diterpenoids epi-eriocalyxin A (2), maoecrystal N (3) and maoecrystal O (4) were isolated. Meanwhile, the structure of a known constituent eriocalyxin A was revised.展开更多
A new 6,7-seco-ent-kaurane diterpenoid, together with two known ones, was isolated from the leaves of Isodon eriocalyx var. laxiflora C. Y. Wu & H. W. Li. Their structures were established by spectroscopic methods.
From the aerial parts of Clerodendrum indicum, a novel spiro-compound, named cleroindicin A, was isolated and identified as 7-hydroxy-1-oxy spiro[3,5] nonane, on the basis of chemical convertion and 2D NMR techniques.
文摘Eucaglobulin 1, a new complex of gallotannin and monoterpene, was isolated from the leaves of Eucalyptus globulus. Its structure was determined by spectral methods.
文摘Two new diterpenoids, maoecrystal U and epi-maoecrystal P were isolated from the leaves of Isodon eriocalyx. Their structures were determined as 6 beta-acetoxy-15 beta-hydroxy-3 alpha, 20epoxy-ent-kaur-16-ene-1,7-dione 1 and 16 (s)-methoxymethyl-6 beta,7 beta-dihydroxy-7 alpha,20-epoxy-ent-kaur-2,3-ethenylene-1, 15-dione 2 respectively, by spectroscopic methods.
文摘Erigoster A (la), a new compound with a novel basic skeleton, was isolated from Erigeron breviscapus. The structure elucidation and complete proton and carbon NMR assignments were achieved by the utilization of a combination of two-dimensional NMR techniques.
文摘Phytochemical re-investigation of the anti-leukemia plant Laggera pterodonta afford four new eudemsanes (1-4) and six new eudesmanoic glucosides (5-10), Their structures were elucidated by high field 1D and 2D NMR techniques and chemical methods.
文摘Four new diterpenoids named maoecrystal Q-T (1-4) were isolated from the dried leaves of Isodon eriocalyx. Their sturctures were established by spectroscopic methods.
文摘Ceratoside A (1), a new compound was isolated from the butanol-soluble fraction of Ceratostigma willmottianum, Its structure was determined by the utilization of 2D-NMR techniques.
文摘Two new diterpenoid glucosides, cleroserroside A and cleroserroside B, were isolatedfrom the aerial pans of Clerodendrum serratum var. amplexghlium Moldenke. Their structureswere characterized by spectral and chemical methods.
文摘Five new flavonoids were isolated from the aerial parts of Bidens pilosa L. var. vadiata Sch.-Bip.. Their structures were established on the basis of spectroscopic methods.
文摘From the aerial parts of Clerodendrum indicum, bye new compounds, cleroindicins B-F (1-5) were isolated and their structures identified by spectral method.
文摘From the dried leaves of I. eriocalyx, three new 6,7-seco- ent-kaurane diterpenoids epi-eriocalyxin A (2), maoecrystal N (3) and maoecrystal O (4) were isolated. Meanwhile, the structure of a known constituent eriocalyxin A was revised.
基金The authors wish to thank all members of the analytical group of Phytochemistry Laboratory of Kunming Institute of Botany Academic Sinica for the measurement of spectral data.
文摘A new 6,7-seco-ent-kaurane diterpenoid, together with two known ones, was isolated from the leaves of Isodon eriocalyx var. laxiflora C. Y. Wu & H. W. Li. Their structures were established by spectroscopic methods.
文摘From the aerial parts of Clerodendrum indicum, a novel spiro-compound, named cleroindicin A, was isolated and identified as 7-hydroxy-1-oxy spiro[3,5] nonane, on the basis of chemical convertion and 2D NMR techniques.
